Printing-machine.



W. SCOTT, DEGD. 1. a n. J. soo'h'r, nxsou'rons. PRINTING MACHINE.

2 BHEIITSSHEET 1.

A TTOHNE Y COLUMBIA PLANOGIzAlm CU..W/\$"|NGTON. n. c.

W. SCOTT, DBGD.

I. a D. J. SCOTT, nxnom'ons. PRINTING MACHINE.

1,007,895. APPLIUATION FILED PEBJQ, 190B. 7, 2 BHEIFTB-SHEET 2. 1 I 7 E "r '"t- I "ml 5; l as 45 46%[51 4 I rhgfq Zldiar&6&f WITNESSES a la ATTORNEY UNITE STATES PATENT OFFICE.

ISABELLA SCOTT AND DAVID J. SCOTT, OF PLAINFIELD, NEW JERSEY, EXECUTORS OF WALTER SCOTT, DECEASED.

PRINTING-MACHINE.

Specification of Letters Patent.

Patented Nov. 7, 1911.

Application filed February 12, 1908. Serial No. 415,479.

T 0 all whom it may concern:

Be it known that WALTER Soorr, a citizen of the United States, and late of Plainfield, Union county, New Jersey, did invent certain new and useful Improvements in Printing-Machines, of which the following is a specification.

The present invention relates generally to printing machines, and has more particularly reference to a one-revolution planographic printing machine.

The main object of the invention is to provide suitable tripping mechanism in connection with a machine of this character, and especially in one in which the form cylinder or cylinders make a number of revolutions to each impression, and wherein the impression cylinder makes but one revolution to each impression and delivers the sheet in front with the printed side up.

Accordingly the invention consists in the features of construction, combination of parts and arrangement of elements as will be more fully hereinafter disclosed.

Other improvements will appear as the specification proceeds.

In the accompanying drawings, the invention is embodied in a concrete and preferred form, but changes of construction may of course be made without departing from the spirit of the invention.

In the said drawings :-Figure 1 is a side elevation, partly in section, embodying the invention, of so much of a printing machine as is necessary to the understanding of the invention. Fig. 2 is a detail view in section on the line 2-2 of Fig. 1. Fig. 3 is a plan view of one end of the impression cylinder and adjacent elements. Fig. 4 shows diagrammatically a modification of the arrangement disclosed in Fig. 1. Fig. 5 is a detail view of the actuating device.

Similar characters of reference indicate corresponding parts in the different views.

1 indicates a framework of any suitable construction for properly mounting the parts comprising the machine.

2 is the impression cylinder, which preferably makes, and in the present instance does make, one revolution to each impression. In front of the impression cylinder is located the delivery mechanism indicated vby the tapes 8, which latter may lead to any suitable delivery, preferably the well known printed side up drop delivery.

In order to deliver the sheet in front of a one-revolution impression cylinder with the printed side up, it is desirable to provide the said cylinder with an impression surface and a transfer surface. These are indicated respectively by 4 and 5. Furthermore means, as the transfer cylinder 6 making two revolutions to each impression, are provided for transferring the sheet from one surface to the other. In the present instance the sheet is taken from the impression surface to the transfer surface. The transfer cylinder, in the present instance, is similar to one disclosed in an application filed Jan. 25, 1904:, Ser. No. 190630 and is provided with the perforations 7 for keeping the body of the sheet up against the circumferential guide 8 and away from the cylinder so as not to smudge the freshly printed sheet. In the form here disclosed, there are provided preferably a plurality of form members, in the present instance the form cylinders 9 and 10. These make two revolutions to each impression and are therefore inked twice to each impression. It will be understood that some provision must be made to prevent these cylinders from placing the ink on the transfer surface. Instead of tripping these form cylinders automatically once to each impression, as would have to be done in order to prevent the said transfer of ink, I prefer to have the said transfer surface below the level of the pitch circumference of the impression cylinder, as shown, thereby avoiding the necessity of automatically tripping the form cylinders. In order to prevent the said form cylinders from placing the ink on the impression surface when a sheet is missed in feeding &c., tripping means are provided for tripping both form cylinders, preferably simultaneously during the same cycle of the machine. These means are normally inoperative and are under the control of an actuating device which may be either connected to the automatic feeding machine, if such is used, or, as shown in the present instance, under the control of the operator by means of a foot treadle. These means will preferably take the following form: The cylinders 9 and 10 are mounted in eccentric bushings 11 connected to the rockshafts 12 by means of the arms 13 and 14 and rods 15. A suitable connection as 16 and arms 17 connect the two rockshafts so that they can be moved in unison. 18 indicates a pendulum lever pivoted at 19 and operated once to each impression by means of the cam 20 moving with the impression cylinder, and friction roll 21. On the lower end of the lever 18 is the shoe 22. Mounted slidingly in the connection 16 are the two pins 23 and 24 interconnected by means of the swinging lever 25 pivoted at 26.. A spring 27 is provided so that the pin 24 will normally protrude into the path of the shoe 22. During tlie normal operation of the machine, the shoe having engaged the pin 24 to move the form cylinders into the untripped position, the

pendulum lever will move idly back andv forth. Mounted slidingly in the framework is the member 28 connected to the stud 29 and foot treadle 30. This member is normallylheld outward by 'meansof the counterweight 31 or by similar means. WVhen, however, it is desired to trip the form cylinders, the foot treadle will be depressed and thei member 28 will engage with the pin 23 and move the latter outward into the path of the .shoe- .22 which thereupon will engage the; said pin 23 and move the formcylinders into 1 their tripped position.

When the foot treadle is released, the spring 27 will with-f draw the pin 23 and move the pin 24 out-3 ward. The shoe 22 will then untrip the cylinders again.

cylinder is provided with the tumbler grippers32 adapted to be operated by the pins 33 and 34 stationary on the framework so as to-iclose the said grippers to take a sheet:

at the feeding point, and open the same to release-the sheet when it comes opposite thef transfer cylinder. The transfer cylinder is provided with the spring seated grippers 35 opened alternately by the pivoted cams *ing from within the transfer cylinder, it

is desirable to provide a hinged portion 44 On the transfer surface, adapted to be@ moved outwardly so as to contact with the transfer cylinder by means of the cam 45; stationary on .the framework, and lever 46. This cam, however, is so timed that the said.

hinged portion will be below the pitch cir-i cumference of the impression cylinder when it- "moves past "the form cylinders.

The 5 transfer surface is provided with the spring;

seated grippers 47 operated by the cams 48;

and 49 :to "receive the sheet from the transfer cylinder. and to release it so that the the cam 54 on the impression cylinder and by means of the friction roll 55. The cam 45 is further more so timed that the pivoted portion of the transfer surface of the impression cylinder is held outward while the sheet is being delivered, so that the friction rolls 52 may properly cotiperate therewith. In the present instance where a multicolor planographic machine is shown, the form cylinders will preferably be located one forwardly of the vertical center line of the impression cylinder with the ink rolls 56 superposed above the same and with the water rolls 57 located below the form cylinder, while the other form cylinder is positioned rearwardly of the vertical center line of the impression cylinder with the water rolls 58 superposed above the form cylinder and with the inking rolls 59 located below the said form cylinder.

In Fig. 4 is shown a modification in which a third form cylinder 60 is employed. In order to trip this third form cylinder with the other cylinders an arm 61 is provided on the cylinder 9 connected by means of the rod 62 with the arm 63 of the eccentric bushing 64, or any other suitable means may be used for this purpose. The impression surface of the impression What'is claimed is:

1. In a printing machine, the combina tion of two cylinders, two rockshafts, means for tripping and untripping both of said cylinders from the rockshafts, a connection between the two rockshafts whereby they can be moved in unison, a movable member, and means carried by the said connection for engaging with the said movable member in opposite directions arranged so as to be in its path in one direction only at one time.

2. In a printing machine, the combination of two cylinders, two .rockshafts, means for tripping and untripping both of said cylinders from the rockshafts, a connection between the two rockshafts whereby they can be moved in unison, a movable member, and two pins, for engaging with the said movable member in opposite directions, interconnected so that when one is in the path of the movable member the other one is out of its path.

cylinders, two rockshafts, means for tripping and untripping bothof said form cylinders from the rockshafts, a-connection between the two rockshafts whereby they can be moved in unison, a pendulum lever operating once to each impression, and means carried by the said connection for engaging with the said pendulum lever in opposite directions arranged so as to be in its path in one direction only at a time.

4:. In a printing machine, the combination with an impression cylinder making one revolution to each impression, of two form cylinders, two rockshafts, means for tripping and untripping both of said form cylinders from the rockshafts, a connection between the two rockshafts whereby they can be moved in unison, a pendulum lever operating once to each impression, and two pins, for engaging with the said pendulum lever in opposite directions, interconnected so that when one is in the path of the pendu lum lever the other one is out of its path.

5. In a printing machine, the combination with an impression cylinder, of a plurality of form cylinders coacting with the said impression cylinder, a pair of rockshafts, a movable member, a connection between the rockshafts carrying means adapted to be engaged by said movable member to cause simultaneous operation of the rockshafts, and connections between the rockshafts and Copies of this patent may be obtained for the form cylinders for tripping and untripping said cylinders with respect to the impression cylinder.

6. In a printing machine, the combination with an impression cylinder, of a plurality of form cylinders coacting therewith, rockshafts, a connection between said rockshafts, a movable member, means carried by said connection to be engaged by the movable member to cause actuation of the rockshafts in either of two directions, means controlling the direction of movement of the rockshafts, and connections between the rockshafts and the form cylinders whereby the form cylinders are tripped or untripped, dependent upon the movement of the rockshafts.

Signed at Plainfield, Union county, New Jersey, this 31st day of December, 1907.

ISABELLA SCOTT,

DAVID J. SCOTT, Ewecutors 0f the estate of W'alter Scott. Witnesses:

AXEL V. BEEKEN, J. 01mm RIPLEY.

five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

